Movement of Molecules Flashcards
net movement of a substance from a region of higher concentration to
lower concentration; passive transport (no energy required)
Diffusion
net movement of a substance from a region of higher concentration to
lower concentration; passive transport (no energy required)
Diffusion
refers to the difference in concentration of a substance
from one region to another
Concentration Gradient
no net change in a system; molecules become
evenly distributed yet continue to move at an even exchange.
Equilibrium
The plasma (cell) membrane is\_\_\_\_\_\_\_meaning that some substances pass freely while the passage of other substances is strictly controlled.
Selective Pearmable
What is lysis?
the cell will swell and ultimately burst
– diffusion of molecules through air, water or a solid medium
Simple diffusion
diffusion of a solute across a selectively permeable membrane
Dialysis
diffusion of water across a selectively permeable membrane
Osmosis
to the solute concentration of a solution outside a cell and its effect
on cellular fluid volume.
Tonicity
the solution containing more solute is
hypertonic
the solution containing less solute is
hypotonic
Two solutions with the same solute concentration are
isotonic.
refers to the difference in concentration of a substance
from one region to another
Concentration Gradient
no net change in a system; molecules become
evenly distributed yet continue to move at an even exchange.
Equilibrium
